Question

how can I do this question

Answer 1

heya user!!!

the answer is in the above pic.
You can solve the problem in this way.


hope this helps you
please mark it as brainliest answer

Answer 2

$lhs \\ \frac{a + b + c}{a^{ - 1} b^{ - 1} + b^{ - 1} c^{ - 1} + c^{ - 1} a^{ - 1} } \\ \\ = \frac{a + b + c}{ \frac{1}{ab} + \frac{1}{bc} + \frac{1}{ca} } \\ \\ = \frac{a + b + c}{ \frac{c + a + b}{abc} } \\ \\ = abc = rhs \: \: (proven)$

Hope it will help you .